Three 1-steppers for me:
1. T1 58 UR in c78 setting r2c8<>58.
2. 256 xy-wing pivot at r1c4 setting r7c6<>6.
3. 256 xy-wing pivot at r3c6 setting r7c4<>5.
there is another 256 xy-wing in the same area that I can't get a solution out of.